992 engine vs 991.2 engine
11-12-2019, 12:41 AM
#1
992 engine vs 991.2 engine
Specifics are below the main post but basically (for base to base):
bigger intercooler
new headers
.5 increase in compression
piezo fuel injectors
that’s it. The S gets a slightly bigger Turbos (same as GTS). My service manager said that actually the engine is the only thing they didn’t really **** with in the 992 vs 991.2 where everything else has been changed. It tells me two things: 1- the 991.2 engine was built to last and be driven hard and 2- the 992 engine does nothing the mod community can’t do for the 991.2. I sat in one today and after lots of long looks and playing around I found nothing that made me want to upgrade either in base performance and certainly not in looks. I have a Targa which from earlier pictures the rear of the 992 does not do the Targa justice. Anyway good news for 991.2 and 992 owners is our engines look good for the long haul.
From Car & Driver
The 992 gets a bigger central intercooler at the rear, replacing the pair located in the rear fenders of the 991.2. This 12-percent-larger intercooler gets direct airflow from the base of the wing, has improved internal airflow, and achieves a greater reduction in intake-air temperature. The intercooler air still exhausts in the lower rear fenders, now in nicely split vents.To improve exhaust flow, the stamped-steel manifolds in the 991.2 have been replaced by cast-iron headers. These are said to weigh no more, but flow better, than their double-walled predecessors. The base Carrera will retain the same turbochargers as the 991.2, with a 49-millimeter compressor and a 45-mm turbine wheel. But the Carrera S will get the 55-/48-mm unit used today in the Carrera GTS. The 992 engines also get piezo fuel injectors, which are more expensive than the mechanical direct injectors but provide more precise control of the injection quantity.
These changes have allowed an increase in compression ratio from 10.0:1 to 10.5:1, which pays dividends in both power and efficiency. The 992 Carrera S output increases from 420 to 450 horsepower, without any change in today’s 16.0-psi boost pressure. (That's the same output that today's GTS produces with 18.1 psi.) Expect another 30 ponies or so in the new GTS. The base Carrera, however, gets a smaller bump, from 370 to 385 horsepower, with unspecified reduction in boost pressure from 13.1 psi in the 991.
bigger intercooler
new headers
.5 increase in compression
piezo fuel injectors
that’s it. The S gets a slightly bigger Turbos (same as GTS). My service manager said that actually the engine is the only thing they didn’t really **** with in the 992 vs 991.2 where everything else has been changed. It tells me two things: 1- the 991.2 engine was built to last and be driven hard and 2- the 992 engine does nothing the mod community can’t do for the 991.2. I sat in one today and after lots of long looks and playing around I found nothing that made me want to upgrade either in base performance and certainly not in looks. I have a Targa which from earlier pictures the rear of the 992 does not do the Targa justice. Anyway good news for 991.2 and 992 owners is our engines look good for the long haul.
From Car & Driver
The 992 gets a bigger central intercooler at the rear, replacing the pair located in the rear fenders of the 991.2. This 12-percent-larger intercooler gets direct airflow from the base of the wing, has improved internal airflow, and achieves a greater reduction in intake-air temperature. The intercooler air still exhausts in the lower rear fenders, now in nicely split vents.To improve exhaust flow, the stamped-steel manifolds in the 991.2 have been replaced by cast-iron headers. These are said to weigh no more, but flow better, than their double-walled predecessors. The base Carrera will retain the same turbochargers as the 991.2, with a 49-millimeter compressor and a 45-mm turbine wheel. But the Carrera S will get the 55-/48-mm unit used today in the Carrera GTS. The 992 engines also get piezo fuel injectors, which are more expensive than the mechanical direct injectors but provide more precise control of the injection quantity.
These changes have allowed an increase in compression ratio from 10.0:1 to 10.5:1, which pays dividends in both power and efficiency. The 992 Carrera S output increases from 420 to 450 horsepower, without any change in today’s 16.0-psi boost pressure. (That's the same output that today's GTS produces with 18.1 psi.) Expect another 30 ponies or so in the new GTS. The base Carrera, however, gets a smaller bump, from 370 to 385 horsepower, with unspecified reduction in boost pressure from 13.1 psi in the 991.
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sexfiend (11-13-2019)
11-12-2019, 03:44 PM
#2
Engine mostly unchanged cause next gen will be all electric anyway. Why waste time energy on that 991.2 engine ? The reason to buy or keep the 991.2 is simply cause it's better than the .1 assuming you have some aftermarket exhaust to make up for that lost exhaust note going from NA to Turbo.
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AlexCeres (11-12-2019)
11-12-2019, 04:17 PM
#4
Rennlist Member
There's parts, and tuning. Either one can exceed the other.
Time in the 992S in Spain suggested to me its engine offered the power of the 991.2 Carrera GTS with the even more NA-ish character of the 991.2 Carrera. The revised path of the 992's intercooler/intake plumbing plays no small part in that, apparently—but my takeaway is same old, same old: Porsche had targets with the last engine, and it learned things all the way up to its release and then after that, too. Those lessons have been applied to the successor.
Even so, the more time I spend with the 991.2 3.0, the more I think it's a masterpiece—in any guise. Right up there with the best GT3 engines in terms of its excellence, just with a different focus and intended use.
When it comes to 911s, we are fortunate to be alive and driving right now...
Time in the 992S in Spain suggested to me its engine offered the power of the 991.2 Carrera GTS with the even more NA-ish character of the 991.2 Carrera. The revised path of the 992's intercooler/intake plumbing plays no small part in that, apparently—but my takeaway is same old, same old: Porsche had targets with the last engine, and it learned things all the way up to its release and then after that, too. Those lessons have been applied to the successor.
Even so, the more time I spend with the 991.2 3.0, the more I think it's a masterpiece—in any guise. Right up there with the best GT3 engines in terms of its excellence, just with a different focus and intended use.
When it comes to 911s, we are fortunate to be alive and driving right now...
11-12-2019, 05:19 PM
#5
Three Wheelin'
I think this is a possibility for sure, but perhaps 992.2 GT3/GT2 will go hybrid first (after the 992.2 Turbo S, which is rumored to be first of all 992's to get a hybrid powertrain), and then whatever iteration of GT4 after that will see it trickle down.
11-12-2019, 05:41 PM
#6
Rennlist Member
Lately the .2 variant is where powertrain upgrades are made.
The 991 had a similar powertrain to the 997.2. The 992 is similar to the 991.2.
I also heard that they flipped one of the turbo's around so that it created better symmetry. They also worked on oiling for the turbo's I believe.
All good tweaks. Nothing major.
On paper, when it is wet and cold out, I sit here and say "headers and a tune would be a nice winter project on the T".
Then I drive the car, come home shaking my head at how sweet the short gearing, small turbo's and overall car feels, and think about spending money elsewhere.
The 991 had a similar powertrain to the 997.2. The 992 is similar to the 991.2.
I also heard that they flipped one of the turbo's around so that it created better symmetry. They also worked on oiling for the turbo's I believe.
All good tweaks. Nothing major.
On paper, when it is wet and cold out, I sit here and say "headers and a tune would be a nice winter project on the T".
Then I drive the car, come home shaking my head at how sweet the short gearing, small turbo's and overall car feels, and think about spending money elsewhere.
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S S (11-12-2019)
11-12-2019, 05:49 PM
#7
Rennlist Member
Just do the tune and get a dsc controller. Night and day
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Trending Topics
11-12-2019, 09:33 PM
#8
There's more different than that. For example, the turbos spool differently(different directions now I think) and have different piping too for reduced lag and better power delivery.
11-12-2019, 11:02 PM
#9
Advanced
It would seem that the PDK transmission might be the performance limiter when tuning the 991.2. According to the Porsche specs, the CG1.10 PDK has a maximum torque capacity of 406 ft-lbs (550Nm). The 992 PDK can accomodate 590 ft-lbs of torque.
I'm sure there is some leeway in this number, but some of the pro-tunes seem to easily surpass 406 ft-lbs.
I'm sure there is some leeway in this number, but some of the pro-tunes seem to easily surpass 406 ft-lbs.
11-13-2019, 12:01 AM
#10
https://motoiq.com/la-auto-show-2018...-view-porsche/
As for the 992 engine itself, the only real improvement are the fuel injectors which probably just give a bit better spray pattern. The other upgrades are the parts which bolt-on: the headers, turbos, and intercooler setup. The intercooler setup is really the only thing that'd be difficult to improve on the 991.2 to match the 992. The aftermarket headers from Vektor are superior to the 992 OEM headers which are still log-type, but a better log than the 991.2 headers. And the 992 did go to symmetric turbos (one regular rotation, one reverse rotation) which enabled the better log header design. Why didn't they do that on the 991.2? Probably cost. Instead of paying for tooling for one turbo, now you're paying for tooling for two. The tooling costs for the castings of the turbos ain't cheap.
11-14-2019, 08:31 AM
#11
It would seem that the PDK transmission might be the performance limiter when tuning the 991.2. According to the Porsche specs, the CG1.10 PDK has a maximum torque capacity of 406 ft-lbs (550Nm). The 992 PDK can accomodate 590 ft-lbs of torque.
I'm sure there is some leeway in this number, but some of the pro-tunes seem to easily surpass 406 ft-lbs.
I'm sure there is some leeway in this number, but some of the pro-tunes seem to easily surpass 406 ft-lbs.
11-14-2019, 08:37 AM
#12
Rennlist Member
No the 991.2 carreras have the pdk gearset from the 991.1 turbo with different clutch packs. The 991.2 turbo pdk is beefed up and completely different.
The 991.2 pdk seems to start acting wonky at about 450 crank ft lb which is why tuners have dialed back their tq limits. Manual is good for a bit more because the tcu doesnt step in, not to say its stronger
The 991.2 pdk seems to start acting wonky at about 450 crank ft lb which is why tuners have dialed back their tq limits. Manual is good for a bit more because the tcu doesnt step in, not to say its stronger
11-15-2019, 10:56 AM
#13
Irony on Lap times per Motortrend.
"WeatherTech Raceway Laguna Seca can always be relied upon to throw a surprise during Best Driver's Car. First time out, the 992 Carrera S was two-tenths of a second slower than the 2017 model we tested three years ago. There were puzzled frowns among the Porsche technicians and surprise from Randy, who thought the car felt very quick: "I don't know the time, but I think it's going to overachieve," he said as he pulled off his helmet. "The power-down traction was fantastic."
Turn 4 was the problem. Randy acknowledged that the quick right-hander felt slipperier than usual. Next time out, he took a tighter line, where he found more grip and more midcorner speed. On a fresh set of tires, the Carrera S ran a 1:35.52 lap, nearly a second quicker than its predecessor, more than 0.6 second quicker than the next fastest car, the 630-hp Mercedes-AMG GT 63 S, and a time bested only by the mighty million-dollar McLaren Senna."
So do you think its worth the $$$$$?
Im waiting for the 992.2 generation
Randy was within "drivers error on the track" Just like when I track my 991.2S with a 991.2GTS its down to the driver on WHO is faster... vs a 991.2 TT or GT3 where you will just get destroyed.
"WeatherTech Raceway Laguna Seca can always be relied upon to throw a surprise during Best Driver's Car. First time out, the 992 Carrera S was two-tenths of a second slower than the 2017 model we tested three years ago. There were puzzled frowns among the Porsche technicians and surprise from Randy, who thought the car felt very quick: "I don't know the time, but I think it's going to overachieve," he said as he pulled off his helmet. "The power-down traction was fantastic."
Turn 4 was the problem. Randy acknowledged that the quick right-hander felt slipperier than usual. Next time out, he took a tighter line, where he found more grip and more midcorner speed. On a fresh set of tires, the Carrera S ran a 1:35.52 lap, nearly a second quicker than its predecessor, more than 0.6 second quicker than the next fastest car, the 630-hp Mercedes-AMG GT 63 S, and a time bested only by the mighty million-dollar McLaren Senna."
So do you think its worth the $$$$$?
Im waiting for the 992.2 generation
Randy was within "drivers error on the track" Just like when I track my 991.2S with a 991.2GTS its down to the driver on WHO is faster... vs a 991.2 TT or GT3 where you will just get destroyed.
11-15-2019, 11:03 AM
#14
Irony on Lap times per Motortrend.
"WeatherTech Raceway Laguna Seca can always be relied upon to throw a surprise during Best Driver's Car. First time out, the 992 Carrera S was two-tenths of a second slower than the 2017 model we tested three years ago. There were puzzled frowns among the Porsche technicians and surprise from Randy, who thought the car felt very quick: "I don't know the time, but I think it's going to overachieve," he said as he pulled off his helmet. "The power-down traction was fantastic."
Turn 4 was the problem. Randy acknowledged that the quick right-hander felt slipperier than usual. Next time out, he took a tighter line, where he found more grip and more midcorner speed. On a fresh set of tires, the Carrera S ran a 1:35.52 lap, nearly a second quicker than its predecessor, more than 0.6 second quicker than the next fastest car, the 630-hp Mercedes-AMG GT 63 S, and a time bested only by the mighty million-dollar McLaren Senna."
So do you think its worth the $$$$$?
Im waiting for the 992.2 generation
"WeatherTech Raceway Laguna Seca can always be relied upon to throw a surprise during Best Driver's Car. First time out, the 992 Carrera S was two-tenths of a second slower than the 2017 model we tested three years ago. There were puzzled frowns among the Porsche technicians and surprise from Randy, who thought the car felt very quick: "I don't know the time, but I think it's going to overachieve," he said as he pulled off his helmet. "The power-down traction was fantastic."
Turn 4 was the problem. Randy acknowledged that the quick right-hander felt slipperier than usual. Next time out, he took a tighter line, where he found more grip and more midcorner speed. On a fresh set of tires, the Carrera S ran a 1:35.52 lap, nearly a second quicker than its predecessor, more than 0.6 second quicker than the next fastest car, the 630-hp Mercedes-AMG GT 63 S, and a time bested only by the mighty million-dollar McLaren Senna."
So do you think its worth the $$$$$?
Im waiting for the 992.2 generation
Chevy[Corvette] figured this out years ago and started putting Michelin PSS and then PS4S or better on all of their media cars.
11-19-2019, 08:32 AM
#15
1st Gear
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I tracked the 991.2 C2 and C4 against the 992 C2 and C4 at an Invitational Porsche event. The new 992 handles better and is more responsive--no question about it. Is the change monumental? No.
I have a 2019 911 Carrera GTS with rear wheel steering, PDCC, etc. I will be securing a 992 Turbo S this time next year. The new 992 Turbo S will offer 641 hp, a sport performance package and for the first time a sport exhaust. I am expecting to see 0-60 mph times of 2.3 seconds and a terminal velocity of 211 mph, given the performance advancements in the new car. We'll see.
These are all great cars. Happy driving guys!
I have a 2019 911 Carrera GTS with rear wheel steering, PDCC, etc. I will be securing a 992 Turbo S this time next year. The new 992 Turbo S will offer 641 hp, a sport performance package and for the first time a sport exhaust. I am expecting to see 0-60 mph times of 2.3 seconds and a terminal velocity of 211 mph, given the performance advancements in the new car. We'll see.
These are all great cars. Happy driving guys!